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natishtaylor1p8dirz
08.01.2020 •
Mathematics
Sole the equations for (x,y) 3x+y=1 and
x-y = -5
Solved
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Ответ:
(- 1, 4 )
Step-by-step explanation:
Given the 2 equations
3x + y = 1 → (1)
x - y = - 5 → (2)
Adding the 2 equations term by term eliminates the term in y, that is
(3x + x) + (y - y) = (1 - 5), simplifying gives
4x = - 4 ( divide both sides by 4 )
x = - 1
Substitute x = - 1 into either of the 2 equations for corresponding value of y
Substituting in (1)
3(- 1) + y = 1
- 3 + y = 1 ( add 3 to both sides )
y = 4
Solution is (- 1, 4 )
Ответ:
D
Step-by-step explanation: